def test_derive(self):
landing_datetime = LandingDatetime()
landing_datetime.set_flight_attr = Mock()
start_datetime = A('Start Datetime', datetime(1970, 1, 1))
touchdown = KTI('Touchdown', items=[KeyTimeInstance(12, 'a'),
KeyTimeInstance(30, 'b')])
touchdown.frequency = 0.5
landing_datetime.derive(start_datetime, touchdown)
expected_datetime = datetime(1970, 1, 1, 0, 1)
landing_datetime.set_flight_attr.assert_called_once_with(
expected_datetime)
touchdown = KTI('Touchdown')
landing_datetime.set_flight_attr = Mock()
landing_datetime.derive(start_datetime, touchdown)
landing_datetime.set_flight_attr.assert_called_once_with(None)
def test_can_operate(self):
self.assertEqual(LandingDatetime.get_operational_combinations(),
[('Start Datetime', 'Touchdown')])
